I just thought I should suggest this:
When defining a font, if the font's name has more than one word, you must write: 'font name' (such as: 'Times New Roman' or 'Arial Unicode MS'), whereas if it's name only has one word, you don't need it (such as: Verdana or Tahoma).
Also: it is suggested, because a font does not show if it is not installed on the computer, to add a specification at the end to the type of font. For instance, I would write:
font-family: Arial, Verdana, sans-serif;
So the computer automatically switches to a font in that family. (If my sources are correct, those families are: serif, sans-serif, cursive, fantasy and monospace.) Why I say this: because people don't necessarily have fonts installed, even if they are part of a "safe list".
I know it gets technical here (for people who don't know what these families mean). I'm not even sure what "fantasy" fonts are (or novelty, I think, but that still sort of leaves me a little stumped). But serif, sans-serif and monospace are easy to define =D
This is just a precision and you can totally ignore it! I just thought it could be good to add =]